Predicting Weather © Copyright 2010.  M. J. Krech. All rights reserved.

Cold Front In the US, most Cold Fronts travel in a west to east direction across the country.

Cold Front As a Cold Front passes, the wind will normally shift from a southerly to a northerly direction.

Cold Front Another indicator of an approaching Cold Front is the presence of Cumulonimbus Clouds.

Cold Front Colder weather occurs after a Cold Front has passed.

Warm Front In the US, most Warm Fronts travel in a west to east direction across the country.

Warm Front SSW behind front SSE ahead of front When a Warm Front passes, the wind will normally shift from an east-southeast to south- southwest direction.

Warm Front Another indicator of an approaching Warm Front is the presence of Nimbostratus Clouds.

Warm Front Warmer weather occurs after a Warm Front has passed.

High Pressure H A High Pressure system is an area that has diverging, sinking winds and a clockwise rotation.

High Pressure Fair weather is typically associated with high pressure.

High Pressure Rising pressure indicates sunny weather is approaching.

Low Pressure L A Low Pressure system is an area that has converging, rising winds and a counter-clockwise rotation.

Low Pressure Stormy weather is often associated with low pressure systems.

Low Pressure Sinking pressure indicates rainy weather is approaching.

Stationary Fronts A stationary front forms when a cold front or warm front stops moving. Two masses of air are pushing against each other but neither is powerful enough to move the other. Winds blowing parallel to the front instead of perpendicular can help it stay in place. Differences in temp. and wind on opposite sides; can be cloudy and rainy.

Occluded Fronts Cold fronts move faster than warm fronts. At an occluded front, the cold air mass from the cold front meets the cool air that was ahead of the warm front. The warm air rises as these air masses come together. Occluded fronts usually form around areas of low atmospheric pressure (rain).

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